Hi Everyone,
Routing Information Protocol (RIP) is a widely used routing protocol that uses hop count to determine the best route to a destination.
RIP avoids routing loops from continuing indefinitely by limiting the number of hops permitted between the source and destination. The maximum number of hops supported is 15. Hence, if the hop count becomes 16, it is known as an infinite distance and is considered as unreachable.
With the help of the RIP protocol, the device sends routing update messages at regular intervals to the next router. When the next router receives the changes, it updates them in the routing table and also increases the metric value for the path by 1. The sender of the message is considered as the next hop. The device maintains only the route with the least metric value to a destination.
RIP implements the split horizon, route poisoning and hold-down mechanisms to prevent incorrect routing information from being propagated.
In most networking environments, RIP is not the preferred choice for routing as its time to converge and scalability is poor compared to EIGRP, OSPF, or IS-IS. However, it is easy to configure, because RIP does not require any parameters, unlike other protocols.
RIP uses the User Datagram Protocol (UDP) as its transport protocol and is assigned the reserved port number 520.
XG Firewall implementation of RIP supports following features:
- RIP version 1
- RIP version 2
- Plain text authentication and MD5 authentication for RIP Version 2
- RIPng
The below article describes how to configure RIP in the Sophos XG Firewall.
Sophos XG Firewall: How to configure Routing Information
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